68HC08KH12 Datasheet, PDF (213/262 Pages) Motorola, Inc – 8 BIT MICROCONTROLLER UNITS

Advance Information — MC68HC(7)08KH12
Section 14. External Interrupt (IRQ)
14.1 Contents
14.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213
14.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213
14.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214
14.4.1 IRQ1/V_PP Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
14.5 IRQ Module During Break Interrupts . . . . . . . . . . . . . . . . . . . 217
14.6 IRQ Status and Control Register (ISCR) . . . . . . . . . . . . . . . . 217
14.2 Introduction
The IRQ module provides a non-maskable interrupt input.
14.3 Features
Features of the IRQ module include the following:
• A Dedicated External Interrupt Pin (IRQ1/V_PP)
• IRQ1 Interrupt Control Bits
• Hysteresis Buffer
• Programmable Edge-only or Edge and Level Interrupt Sensitivity
• Automatic Interrupt Acknowledge
• IRQ1/V_PP pin includes internal pullup resistor
MC68HC(7)08KH12 — Rev. 1.0
MOTOROLA
External Interrupt (IRQ)
Advance Information
213